Files
8bitMyGoUI/overlay/tooltip.go
T
ZacharyZhang-NY 5c3c883b7d Add overlay components 176-195; pixel Harbor and Kit.Cue
Dialogs on DialogBase with focusable panels that harbor parked focus,
popovers on PopoverBase, bubbles, drawers, sheets, a lightbox, an RPG
dialogue box, notifications, a pause menu and a dithered title card.
Kit.Cue moves from feedback to pixel.
2026-10-11 23:11:46 -04:00

54 lines
1.4 KiB
Go

package overlay
import (
"time"
"github.com/egoist/mygo/ui"
"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/display"
"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
)
type TooltipOptions struct{}
// tipWidth caps a tip's text in dots.
const tipWidth = 160
// Tooltip bubbles text after 500 ms, or on keyboard focus.
func Tooltip(c *ui.Context, text string, o TooltipOptions, trigger func()) *ui.Element {
k := pixel.K(c)
wrap := ui.Box(c)
show := hint(c, wrap, 500*time.Millisecond)
wrap.Children(trigger)
if show {
bubble(c, wrap.Bounds(), func() {
tip := ui.Box(c).Role(ui.RoleTooltip).Label(text)
tip.Children(func() {
pixel.Text(c, text, pixel.TextOptions{Wrap: true}).Width(k.D(min(pixel.Measure(text), tipWidth)))
})
}, min(pixel.Measure(text), tipWidth)+16)
}
return wrap
}
// bubble floats content by b; w keeps it inside.
func bubble(c *ui.Context, b ui.Rect, content func(), w int) *ui.Element {
k := pixel.K(c)
ww, wh := c.Size()
x := max(0, min(b.X+b.W/2-k.D(8), ww-k.D(w)))
at := max(3, int((b.X+b.W/2-x)/k.Dot()))
var e *ui.Element
ui.Overlay(c, func() {
e = ui.Box(c).Absolute().Left(x).PassThrough()
tail := display.Bottom
if b.Y > k.D(40) {
e.Bottom(wh - b.Y)
} else {
e.Top(b.Y + b.H)
tail = display.Top
}
e.Children(func() { display.Bubble(c, display.BubbleOptions{Tail: tail, At: at}, content) })
})
return e
}